Re: Compiling testpmd with DPDK netvsc PMD

[Nandini Rangaswamy <nandini.rangaswamy@broadcom.com>]

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Hello David and Stephen,
Thanks for your inputs.
As suggested , I compiled testpmd after removing the change below.
+if dpdk_conf.has('RTE_NET_NETVSC')
> +    deps += 'net_netvsc'
> +endif
I ran testpmd with -d option and EAL logging enabled and confirmed that
netvsc driver's .so file is being picked by EAL.

@Stephen Hemminger <stephen@networkplumber.org> I also enabled VMBUS logs
as per your suggestion and saw that vmbus drivers were being probed.
vmbus_probe_one_driver(): VMBUS device 000d3a42-f83c-000d-3a42-f83c000d3a42
on NUMA socket -1
vmbus_probe_one_driver():   probe driver: net_netvsc
hn_vf_attach(): found matching VF port 0
vmbus_probe_one_driver(): VMBUS device 000d3a42-fbcd-000d-3a42-fbcd000d3a42
on NUMA socket -1
vmbus_probe_one_driver():   probe driver: net_netvsc
hn_vf_attach(): found matching VF port 1

Regards,
Nandini


On Wed, Jun 12, 2024 at 7:48 AM Stephen Hemminger <
stephen@networkplumber.org> wrote:

> On Fri, 7 Jun 2024 16:31:51 -0700
> Nandini Rangaswamy <nandini.rangaswamy@broadcom.com> wrote:
>
> > Hi David,
> > Thanks for your email. I inspected meson build output and do see that
> > netvsc is in the list of enabled drivers.
> > ===============
> > Drivers Enabled
> > ===============
> >
> > common:
> >         iavf, mlx5, qat,
> > bus:
> >         auxiliary, pci, vdev, vmbus,
> > mempool:
> >         bucket, ring, stack,
> > dma:
> >
> > net:
> >         af_packet, bond, e1000, ena, failsafe, gve, i40e, iavf,
> >         ice, igc, ixgbe, kni, mlx5, *netvsc*, ring, tap,
> >         vdev_netvsc, vhost, virtio, vmxnet3,
> >
> > Also, i changed the meson.build default_library=shared from static and it
> > worked.
> > Regards,
> > Nandini
> >
> > On Fri, Jun 7, 2024 at 3:56 AM David Marchand <david.marchand@redhat.com
> >
> > wrote:
> >
> > > Hello,
> > >
> > > On Thu, Jun 6, 2024 at 11:32 PM Nandini Rangaswamy
> > > <nandini.rangaswamy@broadcom.com> wrote:
> > > > I tried compiling the testpmd with DPDK netvsc for openwrt by
> setting
> > > CONFIG_RTE_LIBRTE_NETVSC_PMD=y .
> > > >
> > > > However, when I check ldd testpmd, it does not show any of the dpdk
> > > shared libraries including net_netvsc linked to testpmd binary.
>
> Testpmd is a special case. It always is statically linked because it has to
> have several drivers private API's.  So using ldd to check is not going to
> give
> the right answer.
>
> What is the startup of testpmd look like? You may need to enable debugging
> of
> vmbus and netvsc to see all the reasons the driver decided not to be
> probed.
>

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